sqlite – 如何在一个语句中更新两列？

我尝试了以下语句，这不行：

UPDATE exercises
SET times_answered = times_answered + 1
AND av_answeringTime = av_answeringTime + ( (av_answeringTime / (times_answered) ) + ?) * (times_answered + 1)
WHERE name = ?

UPDATE exercises
SET times_answered = times_answered + 1,av_answeringTime = av_answeringTime + ( (av_answeringTime / (times_answered) ) + ?) * (times_answered + 1)
WHERE name = ?

（编辑：李大同）

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